Method and system for data transmission and communication using imperceptible differences in visible light

Patent metadata

Field	Value
Publication number	US-9917644-B2
Application number	US-201314049681-A
Country	US
Kind code	B2
Filing date	Oct 9, 2013
Priority date	Oct 9, 2012
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

An exemplary system for communicating data includes a light source that emits light and a processing device that receives and encodes data into a communication signal. A modulator modulates light emitted by the light source, wherein the modulation is imperceptible to the human eye, and the modulated light includes the encoded data. The modulation of the transmitted light is imperceptible to a human eye. A receiving device receives the modulated light and processes the light to decode the encoded signal and obtain the data.

First claim

What is claimed is:

1. A lighting system for data communication, comprising:
a light source configured to emit light;
an input device for receiving authentication data, the authentication data being used to modulate the light emitted by the light source;
a processing device configured to receive data for communication and generate a signal encoded with the received data;
a modulator configured to modulate light emitted by the light source using the authentication data received by the input device, wherein the modulation is imperceptible to the human eye, undetectable by sensors, includes the encoded signal, and is specific to an operator of a vehicle associated with the light source;
a receiver tuned and configured to receive the modulated light including the encoded data and convert the received light to a current signal, and identify the operator and the vehicle; and
a filter for filtering noise from the received modulated light based on ambient light or light from external sources.

2. The lighting system of claim 1 , wherein the processing device includes a user interface.

3. The lighting system of claim 2 , wherein the processing device is includes at least one of a computer, smart phone, and a display.

4. The lighting system of claim 1 , wherein the processing device is a reading device configured to read communicated data.

5. The lighting system of claim 4 , wherein the processing device is configured to read data communicated by contact or contactless.

6. The lighting system of claim 1 , wherein the authentication information received at the input device is first authentication information and the encoded data includes second authentication information.

7. The lighting system of claim 1 , wherein the light source is a solid-state light source.

8. The lighting system of claim 1 , wherein the light source is an incandescent light, iridescent light, halogen lamp, fluorescent lamp, a light-emitting electrochemical cell, or an infrared lamp.

9. The lighting system of claim 1 , wherein the light source emits visible or invisible light.

10. The lighting system of claim 1 , wherein the modulator is configured to modulate light emission using data security encryption.

11. The lighting system of claim 1 , wherein the modulator is configured to control the light source to emit light including the data received for communication.

12. The lighting system of claim 1 , wherein the modulator is configured to perform high speed modulation of the light source for on/off switching, emission of light pulses, light spectrum switching, and light brightness control.

13. A lighting system for communicating data, comprising:
an input device configured to receive data for communication;
an encoding device configured to generate a signal encoded with the received data;
a light source arranged on a vehicle and configured to emit light;
an input device for receiving authentication data, the authentication data being used to modulate the light emitted by the light source;
a modulator configured to modulate light emitted by the light source using the authentication data received at the input device, wherein the modulation is imperceptible to the human eye, undetectable by sensors, includes the encoded signal, and is specific to an operator of the vehicle;
a receiver tuned and configured to receive the modulated light including the encoded signal and convert the received light to a current signal, the receiver including a filter for filtering noise from the received modulated light based on ambient light or light from external sources, and identify the vehicle based on the modulation;
a decoding device configured to obtain the encoded data from the current signal, decode the encoded data; and
an interface configured to generate an output based on the decoded data.

14. The lighting system of claim 13 , wherein the system is configured to perform full duplex communication.

15. The lighting system of claim 13 , wherein the system is configured to perform half duplex communication.

16. The lighting system of claim 13 , wherein the light source emits invisible light.

17. The lighting system of claim 13 , wherein the modulator is configured to modulate light emission using data security encryption.

18. The lighting system of claim 13 , wherein the modulator is configured to control the light source to emit light including the data received for communication.

19. The lighting system of claim 13 , wherein the modulator is configured to perform high speed modulation of the light source for on/off switching, emission of light pulses, light spectrum switching, and light brightness control.

20. The lighting system of claim 13 , comprising:
an amplifier for amplifying the current signal.

21. A method for communicating data using light, comprising:
inputting, by a processing device, data to be communicated;
encoding, by the processing device, the data to be communicated into a signal;
inputting authentication data to the processor via an input device;
transmitting light via a light source;
modulating, using the authentication data identifying the light source, the transmitted light to transmit the encoded signal, wherein the modulation of the transmitted light is imperceptible to a human eye, undetectable by sensors and is specific to an operator;
receiving, by a receiving device, the modulated light;
filtering the received light or resulting converted signal from the light to reduce noise from external light sources;
identifying, based on changes in the modulated light that are imperceptible to the human eye, a vehicle associated with the light source and controlled by the operator; and
decoding the signal to obtain the encoded data.

22. The method of claim 21 , comprising:
amplifying the filtered light prior to obtaining the encoded signal.

23. The lighting system of claim 1 , wherein the light source is selected from a group consisting of:
one or more lights on a land or maritime vehicle, a flashlight, one or more lights in a room.

Assignees

• Booz Allen & Hamilton
• Booz Allen Hamilton Inc

Inventors

• Ravich Vadim
• Linn Andrew
• Steinhardt Allan O

Classifications

• H04B10/1149

  Arrangements for indoor wireless networking of information · CPC title

• H04B10/1143

  Bidirectional transmission · CPC title

• H04B10/1141

  One-way transmission · CPC title

• H04B10/114

  Indoor or close-range type systems · CPC title

• H04B10/11

  Arrangements specific to free-space transmission, i.e. transmission through air or vacuum · CPC title